Excavator crane



Jan. 19 1926.

L. WEHNER ExCAvAToR CRANE Filed Feb. 20 1922 4 Sheets-Sheet 2 :III HL www;

HIHHHJIIIH IIIIH ATT ORNEYJ': n

dan. /19 ,1926.

| wEi-INER EXcAvAToR CRANE Filed Feb. 20, 1922 4 Sheets-Sheet 5 INVENTOR.'

A TTORNEY'.

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Jan. 19 1926. 41,570,108

' l.. WEHNER l ExcAvAToR CRANE Filed Feb 20, 1922 4 'Sheets-Sheet 4 t INVENTOR.'

A TTORNEY'.

accompanying eration of machinesv of this class,

Patented J an. A1 9,

-UNITED'- STATES TENT oil'lcan` LEWIs WERNER, 6E MILWAUKEE, WISCONSIN, vassIerron 'ro I'AWLIEGANI I Ian-v IISCEFEGEB COMPANY, 0F WEST IIIIIATU'EEE, WISCONSIN,

Excava'ron cmu. Y Y

WISCONSIN'.

a conroa'rIoN or Application mea :amari zo, 1922., serial Eo. 537,676.,

ToaZl/whomtma concern.' 1 Be it known t at I," LEWIS WEIINER, a citizen of the' United States, residing at Milwaukee, in the county ofv Milwaukee and State of Wisconsin, haveinvented cerf tain new and useful Improvements* in Eir-y cavator Cranes, of whic the following 1s a specification,

thereo f. 1 This invention relates morearticularly 0 portabe .'ower shoveling mac ines of the ooman rtype. Its main oheects are to simplify and improve the construction and facilitate the op-y drawing, forming a part larly with relation to the'mechamsm for oerating andfcontrolling the movements lof t e dipper or scoop.

It Aconsists in the construction, arrange-'1, ment and combination of parts as herein.

after particularly described and pointed Icut` in the claims.

' several figures.

' Figure 1 is a side,e1evati on of an exeav -vator "crane or portable power 'shovehng.

In the accompan characters designate t esame parts'inthe machine'embodyingthe invention; Flg.A 2 is 5 5, Fig. 4.

an enlarged section loli the line 2-2, Fig. 1;

Fig. 3 is a similar section on the line-33`,'

Fig. 1; Fig. 4 is an enlarged side elevation of mechanism for shiftingthedilper' relative to the boom lengthwise of the 'is a vertical cross secper arm; and Fi tion of such mec anism on the broken line Referring pris'es a truck or. carriage 1, which .may be of the link belt tread type' or other suitable construction, a horizontally swin g'platform, frame or bod 2, a vertical y ad]ust' able boom 3, hinge or pivoted-at'one end.

to thefront end of the body -2 .and connected therewith 'by adjustable braces per comprising abucket or scoo a hinged dumping bottom 6, olf) 5, havin the iusua or anyl suitable construction,

Thau per outer end of the booni 3A`isl ad'ustab y supported'by a cable 9 wound on* .a um 10 on` the frame'or body 2 and. pass- 55. ing around guiding sheaves -1-1mount ed ^on Y.

reference being had to the J .v V

by saddle blocks'16, which .are journaled'or tion to t eboom, as

particu,-

I -ng drawing'. like to Fig. 1, the machinefcomv 4, and a dipy and a. handle Y or armcomposed vfbi? two parallel members bloom 3 and pivotally and pivoted on the endsof the. shi Apers'haft and m' whichthemembers? oft e'dipper arm are-sup cited-and gxidedin pro r relaf S Own in detai 2 and 3. 1

A sprocket wheel18-is fixed on the shipper shaft -14` betv'v een the bearings 15,' and the frame above the drum, and sheayescb .A I red lbye oke 12, which is pivotglly @91.1.

and shdablv'connected with ;the

r. Shaft" 14;;

pinions 19 are'xed on `said shaft atthe outer sides of said 'bearings and mesh with therackslA` members. 7 are .for the referablymade of hrd The dipper arm sake of exibility, wood and are face .with steel or metal reinforcing and wearing plates 20 andV 21, i lwhich engage saddle-blocks 16, angular guide and wearing --bars 22 fastened toopposite'sidesof the boom, and steel 4or hard metal wearing shoes 'with' the 'inner sides of the 23, fastened to the 'inwardly projectingends of the'saddle blocks. l'.

The frame or body 2, which carries the boom and' dipper, is swung horizontally by the usual-or any suitable means'such as a circular rack 25, fixed on the truck frame,

and by a pinion 26, fixed on a vertical shaft which is journaled inthe swinging. frame or body and may be rotated in 'opposite direc-v tions by suitable vreversible powerf-trans mission connections (not shown in' detail),

with a gasolene engine or motor `27 mount- 'l Aed on` the swinging frame or body, as shown The drawn lengthwise thereof'r'elative "to Ithe boom, by a s ber 2 9, loose y mounted on a' driving shaft 30, as' shown in Fig; 5, and directly c ondiPPel' arm is advanced with-- rocket wheel or driving memnected with. the sprocket wheel-18 on the i shi per shaft by a link belt 31 as indiated in 1g. '1. The shafueo', what is. mounted on the swinging iframe or body 2,

shown in Figs. 4and'5, driving gear`33, and with .faster vfixed and :uw pairs f muy www 'peines P parallel'l with the shipper `shaft 14, is pr'ov1ded, as witha fastfor fixed.

lio

gears 37 and 38, meshing respectively with the fast and loose reversing gears 34 and 35, are mounted on thel driving sprocket or member 29, which is provided at one end adjacent the driving gear 33v with a clutch drum 40, and at the other end with a brake drum 41. A clutch band 43, passing around the drum 40, is adjustably connected at one yend with the gear 33, and is connected at the other end with one arm of al lever 44, which is fulcrumed in and carried by said gear, and the other arm of which is connected with the gear by a spring 45, which tends to expand the clutch hand.

A conel collar 47, mounted on the shaft yBOMand shiftable lengthwise thereof in enfixed part of the frame or body 2, and at the other end with an 'arm 52, indicated byV dotted lines in Fig. 4, on a rocker shaft 53, provided with an arm 54, which is connected by a link I with a treadle or foot lever 56.

.A differential clutch band 58, passing around a drum 59, fixed on the loose reversing gear 35 and crossing itself adjacent its ends, is connected with longer and shorter arms and 61, on a rocker shaft 62, the connection of the band with one of the arms being adjustable.

Avweight 64, sus ended from an arm on the rocker sha 62, is connected with one arm of a lever 66, vthe other arm of which is connected by a link 67 with the treadle or foot lever 56, so that when the clutch band 58 is contracted on the drum 59, to render the planetary reversing gearing operativel for reversing the rotation of the driving sprocket wheel or member 29, the brake band 51 will be expanded, leaving sald sprocket wheel or member free to rotate on the shaft 30.

The treadle or foot lever 56 is provided with a pivoted latch or detent 69, which is held by asprin'g 70 normally in 'engagement with ay shoulder on a segment 71 attached to the frame or body 2, as shownv in Fig. 5. In this, the neutral positionof the treadle or foot lever 56, the brake band 51 and the f clutch band 58 are both expanded and held by the weight 64 out of operative engagement with the drums 41 and 59, thus leaving the driving sprocket wheel or member 29 free to be rotated with the driving shaft 30 and gear. 33, in the direction indicated by a full line arrow in Fig. 4.

ing shaft 3() and driving gear 33. At the same time, the brake band 51 is held by 'the connection of the rocker shaft 53 through the treadle or foot lever 56 with the weight '64-l1ereinbefore described, out of operative engagement with the drum 41, thereby leaving the driving sprocket wheel or member 29 free to be rotated in a direction reverse' to that of the driving shaft 30. v

The construction and arrangement of the differential clutch band 58 and its connections with the rocker shaft 62 are such that when the band is contracted and brought into initial engagement with the drum 59, the tendency of the drum to rotate with the driving shaft 30 in the direction indicated by full line arrow, Fig. 4, will tighten the band on the drum with increasing force the greater the power transmitted through the reversing gearing, to withdraw the dipper scoop 5 towards the boom 3. By depressing the treadle or foot lever 56 to carry the latch or detent 69 below the shoulder on the segment 71, the brake band 5l will be contracted on the drum 41 to lock and hold the driving sprocket or member 29 against rotation in either direction. At the same time, the weight 64 will be lifted, thereby releasing the grip of the clutch band 58 on the drum 59.

The dipper scoop 5 is swung with the arm 7 forwardly and upwardly on the shipper shaft 14, by a cable 72 attached at one end to the boom 3, passing thence downwardly around a sheave 73 connected with the scoop, thence upwardly around a sheave 74, mounted in the upper end 'of the boom 3, and thence to a hoisting drum 75, to which it is attached, and which is mounted on the frame or body 2, parallel with the shaft 30, with v which it is connected by a gear 76 meshing with the gear 33.

I The gear 76 lis connected by suitable transmission gearing with the engine 27, as indicated in Fig. 1, and transmits power from the engine through the gear 33 to the driving shaft 30. A clutch or mechanism like or similar to that shown in Figs. 4 and 5 for connecting the sprocket wheel or driving member 29 with the gear 33, is proxvided for connecting the drum 75 with the/ gear 76 under the control of a hand lever 77, shown in Fig. 1. f

In operation the machine is moved about and -advanced on, the truck 1 to carry the las boom and dipper in"Av proper working position as the work progresses.

The dipper is thrust into or against the material to be shoveled or scooped up, as for instance a bank of graveh'by swinging the hand lever outward, thereby operatively connecting the sprocket wheel 29 with the driving gear 33, the brake band il and clutch band 58 being held out of operativel engagement' with the drums 41 and 59 by the weight 64 and the latch 69. The gear 33 being constantly turned with the shaft 30 4in the same direction by .he engine 27, when the sprocket wheel i's clutched to the gear as above stated, the icoop 5 will be shifted lengthwise of the dipper arm from the boom by the pinions 19 on the shipper shaft 14 engaging the racks 13 on the dipper arm members 7 The dipper is then swung upward by the hoisting drum and cable 72 connected ,with the scoop 5, under the control of the lever 77, while the scoop is held in digging position under the control of the lever 50, till the scoop is filled, when it may be lifted still furtherl and shifted, if necessary, further away from the boom, while it is swung with the boom to one side or the other for dumping into a car or truck, or depositing the material in a convenient place.

The scoop 5 may beheld at a fixed distance from the shipper shaft 14 by releasing the clutch band 43 controlled by the lever 50, and by depressing the foot lever 56, which applies the brake band 51 to the drum 41, while'the clutch band 58 is held out of operative engagement with the drum 59 and the planetary reversing gearing is thus rendered inoperative by Vthe connections hereinbeforel described of the brake and clutch bands with the foot lever 56.

While the dipper arm .is thus held against longitudinal-Vv movement boom 3, the dipper may be swung .up or down on the shipper shaft 1 4, as a pivot to raise or lower the scoop 5, by means of the hoisting drum 75, the operation of which is controlled by a clutch and brake (not shown) like or similar to those shown for controlling the operation of the sprocket wheel 29. y l

After the scoop has been dumped, it is returned to'take up another load, by a reversal of the operations above described, the scoop 5 being withdrawn lengthwise of the dipper arm towards the boom by applying the clutch band 58 to the `drum 59,l which brings the planetary reversing gearing into operation while the brake band 51. is held released, the clutch band 43 having been released with the lever 50.

The construction and arrangement of the pivotal and sliding connections between the dipper arm and the boom and of thedipper operating mechanism and connections,

relative to the .reversible drive shaft therefor, o

avoids side thrust or strain on the boom and dipper arm, admits of grouping the controlling vlevers within convenient reach of the operator and clear View for his constant observation of thev dippcryand admits of the use of a non-reversible gasolene or internal combustion engine, which is more economical and convenient than steam engines and other kinds of motors to operate in connection with machines of this same, of afshaft interposed between said arm and a motor and driven by the latter,- a power transmitting member loosely mounted on said shaft and connected to said arm, and independently controlled means interposed between said member and said shaft for rotating the former in either direction. v

3. In an excavator crane, the combination with. a dipper arm and a constant speed non-reversible motor for operating the same, of a shaft interposed between said.

arm and motor and driven the latter, a power transmitting member loosely mounted on said shaft and connected to said arm, and independently -controlled meansy interposed between said member and said shaft for rotating the former in either direction, said means being frictionally connectable with said member whereby the power maybe applied gradually and the member driven at variable speeds.

4. In an excavator crane, the'combination with a dipper arm and constant s eed nona power transmitting member loosely mounted on said shaft and connected with said arm, and

means also mounted on said shaft for rotating said member in either direction.

5. In an excavator crane, the combination with a dipper arm and constant s eed nonreversible drive shaft therefor, o a power transmitting member loosely mounted on said shaft and connected with said arm, and means `also mounted on said shaft for rotating said member in either. direction, said means and said member being'axially fixed with respect to said shaft and said means being operatively associated with opposite ends of said member respectively.

6. In .an excavator crane, the combination with a dipperarm and constant speed nonreversible drive shaft therefor, of a power transmitting member loosely mounted on said shaft and connected with said arm, means also mounted on said shaft for rotating said member in either direction, said means and said member being axially fixed with respect to said shaft and said means being operatively associated with opposite ends of said member respectively, and friction bands for operatively connecting said means with said member.

7. In an excavator crane, the combination with a dipper arm and constant s eed nonreversible drive shaft therefor, of a power transmitting member loosely mounted on said shaft and connected with said arm,

Vmeans-arranged on said shaft and associated :which the latter are located.

9. In an excavator crane, the combination with the boom, dipper handle, shipper shaft and driving connection between the latter and said shaft, of a drive shaft mounted on the body of said crane, a driving gear fixed thereto, means for driving said shaft at substantially constant speed, a driving member loosely mounted on said shaft and operatively connected with said shipper shaft, means for `connecting said driving member with the driving gear to move the dipper arm in one direction, and planetary reversing gearing interposed between said driving member and said driving shaft for moving the dipper armin the opposite direction.

10. In an excavator crane, the combination with the boom, dipper handle, shipper shaft and driving connection between the latter Iand said shaft, of a drive shaft mounted on the body of said crane, a driving gear fixed thereto, means for driving said shaft at substantially constant speed, a driving member loosely mounted on said shaft and operatively connected with said shipper shaft, :if

friction clutch for connecting said driving' member with the driving shaft, a friction clutch for rendering the reversing gearing operative, a brake for holding said driving member against turning, and allever connected with the brake and with the reversing clutch and adapted to release the brake when the reversing clutch is engaged.

11. In an excavator crane, the combination with the boom, dipper handle, shipper shaft and driving connection between the latter and said shaft, of a drive shaft mounted on the body of said crane, a driving gear fixed thereto, means for driving said shaft at substantially constant speed, a driving member loosely mounted on said shaft and operatively connected with said shipper shaft,'means for connecting said driving member with the driving gear to move the dipper arm in one direction, planetary reversing gearing interposed between said driving member and sald driving shaft for moving the dipper arm in the opposite direction, a friction clutch for connecting said driving member with the driving shaft, a friction clutch for rendering the reversing gearing operative, a brake for holding said driving member against turning, a weighted lever connected with the reversing clutch and with the brake and adapted to release the brake when the reversmg clutch is engaged, and a latch for releasably holding said'lever in neutral position.

In witness whereof I hereto aiix my signature.

LEWIS wEHNER.

soI 

